openEuler 22.03 LTS SP4 update for openssh

1) Race condition

EUVDB-ID: #VU93513

Risk: High

CVSSv3.1: 7.3 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2024-6387

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to a race condition in portable version of sshd. A remote non-authenticated attacker can send a series of requests in order to trigger a race condition and execute arbitrary code on the system.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 22.03 LTS SP4

openssh-help: before 8.8p1-31

pam_ssh_agent_auth: before 0.10.4-4.31

openssh-server: before 8.8p1-31

openssh-keycat: before 8.8p1-31

openssh-debugsource: before 8.8p1-31

openssh-debuginfo: before 8.8p1-31

openssh-clients: before 8.8p1-31

openssh-askpass: before 8.8p1-31

openssh: before 8.8p1-31

CPE2.3

• cpe:2.3:o:openeuler:openeuler:22.03:LTS SP4:*:*:*:*:*:

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2024-1782

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.